I have these two ideas for a fairytale story but don’t know which one to do or combine the two ideas

One have a version of Cinderella where Cinderella has either full blood sisters, or half-sisters who are just as evil as well as the step family. Also instead of a pumpkin and turning it into a coach. I could use a watermelon (or a squash) and turn it into a limo.

My other idea is somehow try to make all the European Princess stories connected together (but it means a lot of disasters would need to happen). Someone curses princess &prince A (now King and Queen A) that it will be many years before their descants will be happy since something terrible would happen (and no its not SB).